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In total, Menlo Security scanned more than 1.75 million URLs representing over 750,000 unique domains. Key findings include:
- More than one in 20 sites (6 percent) were identified by third-party domain classification services as serving malware, spam or botnets.
- Over one in five (21 percent) sites were running software with known vulnerabilities.
- Sites in categories that are typically “trusted” – including computers and technology, business, and shopping - were the top three sources of vulnerable sites.
- Of the 2.5 percent of sites that were “uncategorized,” a significant proportion (16 percent) was running vulnerable software.